2 new heists, a new pistol, new masks and new melee weapons.
+The heists are absolutely the best part of this DLC. Especially Birth of Sky. What a fun, crazy heist that was. Absolutely without a doubt one of my all time favorites. The other heist, Beneath the Mountain, isn't bad either but to me nothing really compares to Birth of Sky.
+/- Aside from the heist itself everything else in this DLC is a meh for me. The masks? Not bad, not great. The pistol? Well it exists alright. Not very special in my eyes. The melee weapons? Nothing out of the ordinary, nothing crazy. The machete and ice pick are cool but thats all.
Just for the heists alone I'll recommend it.